1. It's difficult to make a box that weighs more than 700 grams, as it can tear the box.
2. It's difficult to make boxes with unusual shapes, or if you want to put more than one item in the box and need an internal pad to hold the items together.
3. It's difficult to make a box that's too small, so please make sure that the length of the item you want to put inside the box is at least 30mm each in width, length, and height!